Enantiomeric units

{
  "id": "MLC-T-CHM-003865",
  "term": "Enantiomeric units",
  "field": "Chemistry",
  "definition": "A pair of configurational units of one constitutional unit that are non-superposable mirror images, such as the R and S forms of the propylene unit in a polypropylene chain. They arise either from chiral monomers or, more often in vinyl polymers, from a prochiral monomer that creates a stereogenic center on addition. In syndiotactic polypropylene the two forms alternate regularly along the chain.",
  "subject": "Polymer",
  "see_also": [
    "configurational unit",
    "constitutional unit"
  ],
  "references": [
    "Purple Book, 1st ed., p. 27 (http://old.iupac.org/publications/books/author/metanomski.html)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/enantiomeric-units/"
}